Technical description and composition of the TCL LED32D2930 TV, panel type and applicable modules. The composition of the modules.TCL LED
Model: LED32D2930
Chassis / Version: MS08B
Panel: ST3151A05-8 Ver 2.4
LED backlight: 4C-LB3206-HR03J 32HR330M06A5 V5
T-CON: MT3151A05-5-XC-9
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
MainBoard: TP.MS6308.PB775 MS08B / G / E / FP1
IC MainBoard: Nand Flash: 29F4G08ABADA, Audio: TPA3110D2
Tuner: NoName
Control: IR & Button Board: 40-32D29B-KEA2LG, WiFi: 07-MT7601-MA0G
Technical Specifications LED32D2930
TCL LED32D2930
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The TCL LED32D2930 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard TP.MS6308.PB775 board. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound, it responds to the remote. Or the image appears when you turn it on and immediately disappears
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the TP.MS6308.PB775 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - Nand Flash: 29F4G08ABADA, Audio: TPA3110D2 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If a NoName tuner is suspected of a malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Owners and users of the TCL LED32D2930 TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of MainBoard TP.MS6308.PB775 is shown in the figure below:TP.MS6308.PB775
Main features of the TCL LED32D2930 device:
Installed matrix (LED panel) ST3151A05-8 Ver 2.4.
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-9.
To power the backlight LEDs, a converter is used, combined with the main board TP.MS6308.PB775.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit.
MainBoard - the main board (motherboard) is a module TP.MS6308.PB775, using Nand Flash chips: 29F4G08ABADA, Audio: TPA3110D2 and others.
The NoName tuner provides television reception and channel tuning.
TCL LED32D2930 TV with an ST3151A05-8 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. LED TV backlighting is implemented in the manufacturing technology of the screen of this TV model. High quality images can be viewed at 1366x768 pixels in standard graphic decomposition 720p (HD Ready).
LED32D2930 TV is equipped with SMART software, built-in applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x3, USB, Ethernet (RJ-45), Wi-Fi. An output for connecting headphones is provided.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 734x482x201 mm, without stand 734x432x81 mm.
TV Weight: with stand: 4.6 kg, without stand: 4.5 kg.
Attention! The ST3151A05-8 Ver 2.4 panel of the TCL LED32D2930 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.